French Patent # 899,401

This patent covers the classic Campagnolo design for a quick release. The drawings could be of many front hubs available today.

Some of the historical context is that Tullio Campagnolo applied for this patent in April 1943, three months before the war arrived on Italian soil with the allied invasion of Sicily in July 1943. Benito Mussolini was also deposed and arrested that July. It must have been a wacky time to be pondering the optimal design for quick release hubs!